on super bowl sunday, the game between the harbaugh brothers is not the only game in town. another smaller, furrier brawl will play out on animal planet's puppy bowl ix. there will be no shortage of fierce fights, personal fouls. >> no, no, no. excessive cuteness, you two. >> reporter: the lineup scruffier, legs shorter. there will be plenty of heart and grit. hedgehogs on the sidelines. hamsters in the air. it's all-out animal mania. the best part, the animals come from pet finder. they're all available for adoption. in this game, they're all top dogs. >> touchdown! how does it feel? >> reporter: find out, puppy bowl ix, of course, on animal planet. joining us now, our referee, dan. how are you? >> i'm pumped. >> these are the players today. we have favorites now. four of them, i think, are going home with my colleagues. what are the rules? >> a chew toy has to be carried into the end zone. that counts as a touchdown. there's no teams. individual sport here. >> can we do it? let's do this thing. >> you want to do the game. >> let's do this thing. >> all right, here we go,